• WordNet 3.6
    • adj occasional recurring or reappearing from time to time "periodic feelings of anxiety"
    • adj occasional occurring from time to time "took an occasional glass of wine"
    • adj occasional occurring or appearing at usually irregular intervals "episodic in his affections","occasional headaches"
    • adj occasional occurring from time to time "casual employment","a casual correspondence with a former teacher","an occasional worker"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Wasps that feed on ferment occasionally get drunk and pass out
    • Occasional Occuring at times, but not constant, regular, or systematic; made or happening as opportunity requires or admits; casual; incidental; as, occasional remarks, or efforts. "The . . . occasional writing of the present times."
    • Occasional Of or pertaining to an occasion or to occasions; intended for a specific occasion; for use only when needed, and not regularly.
    • Occasional Produced by accident; as, the occasional origin of a thing.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Methylphenidate (Ritalin) is a medication prescribed for individuals (usually children) who have an abnormally high level of activity or attention-deficit hyperactivity disorder (ADHD). According to the National Institute of Mental Health, about 3 to 5 percent of the general population has the disorder, which is characterized by agitated behavior and an inability to focus on tasks. Methylphenidate also is occasionally prescribed for treating narcolepsy. Methylphenidate is a central nervous system (CNS) stimulant. It has effects similar to, but more potent than, caffeine and less potent than amphetamines. It has a notably calming effect on hyperactive children and a "focusing" effect on those with ADHD.
    • occasional Of occasion; incidental; hence, occurring from time to time, but without regularity or system; made, happening, or recurring as opportunity requires or admits: as, an occasional smile; an occasional fit of coughing.
    • occasional Called forth, produced, or used on some special occasion or event; suited for a particular occasion: as, an occasional discourse.
    • occasional That serves as or constitutes the occasion or indirect cause; causal.
    • n occasional A production caused by or adapted to some special occurrence, or the circumstances of the moment; an extemporaneous composition.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Occasionally, hot dog sales at baseball stadiums exceed attendance, but typically, hot dog sales at ballparks average 80 percent of the attendance.
    • adj Occasional falling in the way or happening: occurring only at times: resulting from accident: produced on some special event
    • ***


  • Sidonie Gabrielle Colette
    “It is not a bad thing that children should occasionally, and politely, put parents in their place.”
  • Edgar Watson Howe
    “The underdog often starts the fight, and occasionally the upper dog deserves to win.”
  • Source Unknown
    Source Unknown
    “Man is occasionally what he should be perpetually.”
  • Winston Churchill
    “Man will occasionally stumble over the truth, but most of the time he will pick himself up and continue on.”
  • Robertson Davies
    “If we seek the pleasures of love, passion should be occasional, and common sense continual.”
  • Alexander Smith
    “To be occasionally quoted is the only fame I care for.”


Webster's Revised Unabridged Dictionary
Cf. F. occasionnel,
Chambers's Twentieth Century Dictionary
Fr.,—L. occasion-emoccidĕreob, in the way of, cadĕre, casum, to fall.


In literature:

Occasionally, natives were found in the neighbourhood of Ben Lomond.
"The History of Tasmania , Volume II (of 2)" by John West
Still, vomiting is a symptom that is occasionally seen in the horse.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
Betty had been out to tea occasionally, and Doris tried to make believe it was so now.
"A Little Girl in Old Boston" by Amanda Millie Douglas
We occasionally met native boats, and were thus reminded we were not the only human begins in that district.
"Life and Work in Benares and Kumaon, 1839-1877" by James Kennedy
Occasionally a solitary wolf is seen prowling over the morass, and wild cats also clamber amid its woods.
"The Western World" by W.H.G. Kingston
Occasionally the mates glanced at each other in the gloom when a steamer's whistle sounded ahead.
"Blow The Man Down" by Holman Day
As for workers proving occasionally fertile, I have but little to say.
"Mysteries of Bee-keeping Explained" by M. Quinby
Occasionally one of these men would turn to look at this slender schoolboy who seemed in such a hurry.
"Jack" by Alphonse Daudet
Occasional flashes of unconscious humour often saved the indifferent performer from boring his audience.
"The 28th: A Record of War Service in the Australian Imperial Force, 1915-19, Vol. I" by Herbert Brayley Collett
An occasional shot came from the distance.
"Desert Conquest" by A. M. Chisholm

In poetry:

Letters come in many forms:
Some are sick and some are sad,
Brilliant just occasionally,
Far more often very bad.
""Don't be angry if I write..."" by Konstantin Simonov
The silent sun over the earth held sway,
Occasional rifles cracked, and far away
A heedless speck, a 'plane, slid on alone
Like a fly traversing a cliff of stone.
"Comrades An Episode" by Robert Nichols
All day she plays at chess with the bones of the world:
Favored (while suddenly the rains begin
Beyond the window) she lies on cushions curled
And nibbles an occasional bonbon of sin.
"Female Author" by Sylvia Plath
The Palace Gardens. Interrupted sounds of music and revelry
come though the open windows of the ball-room, seen in the
background. RIBERA, pacing the stage, occasionally pausing
to look in upon the dancers.
"The Spagnoletto. Act II" by Emma Lazarus
Betrothed they were when very young - before they'd learnt to speak
(For SARAH was but six days old, and PETER was a week);
Though little more than babies at those early ages, yet
They bashfully would faint when they occasionally met.
"The Modest Couple" by William Schwenck Gilbert
The darkening line of trees speeds by us,
The stars glimmering in their branches
Like fire-flies on a summer evening.
An occasional square of orange light gleams
From their midst its message
Of fire-side love and a beckoning arm-chair.
"En Tour " by Edith Mirick

In news:

Occasionally, he will join the show to report on what he's discovered.
I still have an occasional cough this evening, but it is 95 percent better.
Airport checkpoints create lines, pat-downs and occasional headaches for travelers.
'Cronkite' by Douglas Brinkley is occasionally critical.
We continue today with reality TV personality Laura Croft 's occasional series of fashion fun.
For three months in 2002, Weiner dated Fox news analyst and occasional Post contributor Kirsten Powers.
Occasionally, homeowners purchase and plant a beautiful, healthy ixora and then watch it slowly deteriorate over time.
The Occasional Curmudgeon is Berkeley writer David Esler.
"Just walking around the corridors, I'm occasionally singing a tune while I work," said Robinson, a longtime custodian at the high school.
The 35th Occasional Pasadena Doo Dah Parade romps through East Pasadena on Saturday, April 28th stepping off at 11:00am.
She'll offer observations, critiques, occasional off-beat tales and answers to select e-mail inquires.
Elizabeth Farnsworth speaks with Indira Lakshmanan in one of our our occasional series of conversations with reporters posted overseas with American news organizations.
The third in an occasional series on security and business planning in a changed world.
Aside from funds for an occasional newspaper advertisement, virtually all of Centurione's marketing budget is used to inform and reward the special customers.
Robotics is a topic I occasionally cover here.

In science:

In particular, the signals used in typical practical realizations of QKD are dim laser pulses, which occasionally contain more than one photon.
Phase randomization improves the security of quantum key distribution
Up to now the typical large deviation results on random matrices have dealt with the empirical eigenvalue density of a certain sequence of matrices; occasionally these matrices were algebraically expressed from two (as in ).
Large deviations for functions of two random projection matrices
We will occasionally use stronger facts valid for this theory.
Integration in valued fields
We will occasionally refer to stable definable sets. A definable set D of a theory T is called stable if there is no model M |= T and M -definable relation R ⊆ D2 and infinite subset J ⊆ M (D) such that R ∩ J 2 is a linear ordering.
Integration in valued fields
The simplest scenario would be that occasional reorientational jumps between the two standard orientations (around the C2 axis) would average out the symmetry from D2h to D4h .
Static and dynamic Jahn-Teller effect in the alkali metal fulleride salts A4C60 (A = K, Rb, Cs)